noUselessThisAlias

JavaScript (and super languages)

摘要

¥Summary

规则生效日期：v1.0.0

¥Rule available since: v1.0.0
诊断类别：lint/complexity/noUselessThisAlias

¥Diagnostic Category: lint/complexity/noUselessThisAlias
此规则为推荐规则，默认启用。

¥This rule is recommended, which means is enabled by default.
此规则包含 safe 修复程序。

¥This rule has a safe fix.
此规则的默认严重级别为 information。

¥The default severity of this rule is information.
来源：

¥Sources:
- 灵感来自 @typescript-eslint/no-this-alias
  
  ¥Inspired from @typescript-eslint/no-this-alias

如何配置

¥How to configure

1
{
2
  "linter": {
3
    "rules": {
4
      "complexity": {
5
        "noUselessThisAlias": "error"
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      }
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    }
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  }
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}

描述

¥Description

禁止无用的 this 别名。

¥Disallow useless this aliasing.

箭头函数从其封闭范围继承 this；这使得 this 别名在这种情况下变得无用。

¥Arrow functions inherits this from their enclosing scope; this makes this aliasing useless in this situation.

示例

¥Examples

无效

¥Invalid

1
class A {
2
    method() {
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        const self = this;
4
        return () => {
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            return self;
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        }
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    }
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}

code-block.js:3:15 lint/complexity/noUselessThisAlias  FIXABLE  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  ℹ This aliasing of this is unnecessary.
  
    1 │ class A {
    2 │     method() {
  > 3 │         const self = this;
      │               ^^^^^^^^^^^
    4 │         return () => {
    5 │             return self;
  
  ℹ Arrow functions inherits `this` from their enclosing scope.
  
  ℹ Safe fix: Use this instead of an alias.
  
    1 1 │   class A {
    2 2 │       method() {
    3   │ - ········const·self·=·this;
    4 3 │           return () => {
    5   │ - ············return·self;
      4 │ + ············return·this;
    6 5 │           }
    7 6 │       }

有效

¥Valid

1
class A {
2
    method() {
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        const self = this;
4
        return function() {
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            this.g();
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            return self;
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        }
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    }
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}

noUselessThisAlias

摘要

如何配置

描述

示例

无效

有效

相关链接